How to setup java 11 for the heroku pipline

[Valentyn Kolesnikov]

Hey you guys,

Anyone know how to setup jdk 11 for the heroku deployment?

I tried this configuration:

```

pipelines:
default:
- step:
name: Build and test
image: maven:3-jdk-11
caches:
- maven
script:
- mvn -B clean verify -DskipTests
- step:
name: Create artifact
script:
- tar czfv application.tgz pom.xml src/ lib/
artifacts:
- application.tgz
- step:
name: Deploy to production
deployment: production
script:
- pipe: atlassian/heroku-deploy:0.1.1
variables:
HEROKU_API_KEY: $HEROKU_API_KEY
HEROKU_APP_NAME: $HEROKU_APP_NAME
ZIP_FILE: "application.tgz"
```

[Valentyn Kolesnikov]

I solved this by adding system.properties file:

tar czfv application.tgz pom.xml system.properties src/ lib/

[rigo_campo]

How would that configuration be with gradle?